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                    方法
            
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                    基于指针对象的方法
            
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                    通过嵌入结构体来扩展类型
            
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                    方法值和方法表达式
            
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                    示例: Bit数组
            
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                    封装
            
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                    接口
            
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                    接口是合约
            
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                    接口类型
            
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                    实现接口的条件
            
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                    flag.Value接口
            
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                    接口值
            
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                    sort.Interface接口
            
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                    http.Handler接口
            
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                    error接口
            
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                    示例: 表达式求值
            
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                    类型断言
            
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                    基于类型断言识别错误类型
            
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                    通过类型断言查询接口
            
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                    类型分支
            
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                    示例: 基于标记的XML解码
            
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                    补充几点
            
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                    Goroutines和Channels
            
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                    Goroutines
            
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                    示例: 并发的Clock服务
            
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                    示例: 并发的Echo服务
            
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                    Channels
            
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                    并发的循环
            
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                    示例: 并发的Web爬虫
            
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                    基于select的多路复用
            
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                    示例: 并发的目录遍历
            
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                    并发的退出
            
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                    示例: 聊天服务
            
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                    基于共享变量的并发
            
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                    竞争条件
            
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                    sync.Mutex互斥锁
            
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                    sync.RWMutex读写锁
            
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                    内存同步
            
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                    sync.Once惰性初始化
            
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                    竞争条件检测
            
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        <li class="chapter " data-level="1.10.7" data-path="../ch9/ch9-07.html">
            
                <a href="../ch9/ch9-07.html">
            
                    
                    示例: 并发的非阻塞缓存
            
                </a>
            

            
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        <li class="chapter " data-level="1.10.8" data-path="../ch9/ch9-08.html">
            
                <a href="../ch9/ch9-08.html">
            
                    
                    Goroutines和线程
            
                </a>
            

            
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            </ul>
            
        </li>
    
        <li class="chapter " data-level="1.11" data-path="../ch10/ch10.html">
            
                <a href="../ch10/ch10.html">
            
                    
                    包和工具
            
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            <ul class="articles">
                
    
        <li class="chapter " data-level="1.11.1" data-path="../ch10/ch10-01.html">
            
                <a href="../ch10/ch10-01.html">
            
                    
                    包简介
            
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        <li class="chapter " data-level="1.11.2" data-path="../ch10/ch10-02.html">
            
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                    导入路径
            
                </a>
            

            
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                <a href="../ch10/ch10-03.html">
            
                    
                    包声明
            
                </a>
            

            
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                <a href="../ch10/ch10-04.html">
            
                    
                    导入声明
            
                </a>
            

            
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                    包的匿名导入
            
                </a>
            

            
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        <li class="chapter " data-level="1.11.6" data-path="../ch10/ch10-06.html">
            
                <a href="../ch10/ch10-06.html">
            
                    
                    包和命名
            
                </a>
            

            
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                    工具
            
                </a>
            

            
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            </ul>
            
        </li>
    
        <li class="chapter " data-level="1.12" data-path="../ch11/ch11.html">
            
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                    测试
            
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            <ul class="articles">
                
    
        <li class="chapter " data-level="1.12.1" data-path="../ch11/ch11-01.html">
            
                <a href="../ch11/ch11-01.html">
            
                    
                    go test
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="1.12.2" data-path="../ch11/ch11-02.html">
            
                <a href="../ch11/ch11-02.html">
            
                    
                    测试函数
            
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        <li class="chapter " data-level="1.12.3" data-path="../ch11/ch11-03.html">
            
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                    测试覆盖率
            
                </a>
            

            
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        <li class="chapter " data-level="1.12.4" data-path="../ch11/ch11-04.html">
            
                <a href="../ch11/ch11-04.html">
            
                    
                    基准测试
            
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                    剖析
            
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                    示例函数
            
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            </ul>
            
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        <li class="chapter " data-level="1.13" data-path="../ch12/ch12.html">
            
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                    反射
            
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            <ul class="articles">
                
    
        <li class="chapter " data-level="1.13.1" data-path="../ch12/ch12-01.html">
            
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                    为何需要反射?
            
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        <li class="chapter " data-level="1.13.2" data-path="../ch12/ch12-02.html">
            
                <a href="../ch12/ch12-02.html">
            
                    
                    reflect.Type和reflect.Value
            
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        <li class="chapter " data-level="1.13.3" data-path="../ch12/ch12-03.html">
            
                <a href="../ch12/ch12-03.html">
            
                    
                    Display递归打印
            
                </a>
            

            
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        <li class="chapter " data-level="1.13.4" data-path="../ch12/ch12-04.html">
            
                <a href="../ch12/ch12-04.html">
            
                    
                    示例: 编码S表达式
            
                </a>
            

            
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        <li class="chapter " data-level="1.13.5" data-path="../ch12/ch12-05.html">
            
                <a href="../ch12/ch12-05.html">
            
                    
                    通过reflect.Value修改值
            
                </a>
            

            
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        <li class="chapter " data-level="1.13.6" data-path="../ch12/ch12-06.html">
            
                <a href="../ch12/ch12-06.html">
            
                    
                    示例: 解码S表达式
            
                </a>
            

            
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        <li class="chapter " data-level="1.13.7" data-path="../ch12/ch12-07.html">
            
                <a href="../ch12/ch12-07.html">
            
                    
                    获取结构体字段标签
            
                </a>
            

            
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        <li class="chapter " data-level="1.13.8" data-path="../ch12/ch12-08.html">
            
                <a href="../ch12/ch12-08.html">
            
                    
                    显示一个类型的方法集
            
                </a>
            

            
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        <li class="chapter " data-level="1.13.9" data-path="../ch12/ch12-09.html">
            
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                    几点忠告
            
                </a>
            

            
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                    底层编程
            
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                    unsafe.Sizeof, Alignof 和 Offsetof
            
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        <li class="chapter " data-level="1.14.2" data-path="../ch13/ch13-02.html">
            
                <a href="../ch13/ch13-02.html">
            
                    
                    unsafe.Pointer
            
                </a>
            

            
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        <li class="chapter " data-level="1.14.3" data-path="../ch13/ch13-03.html">
            
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                    示例: 深度相等判断
            
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        <li class="chapter " data-level="1.14.4" data-path="../ch13/ch13-04.html">
            
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                    通过cgo调用C代码
            
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                    附录
            
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        <a href=".." >示例: 基于标记的XML解码</a>
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                                <h2 id="714-&#x793A;&#x4F8B;-&#x57FA;&#x4E8E;&#x6807;&#x8BB0;&#x7684;xml&#x89E3;&#x7801;">7.14. &#x793A;&#x4F8B;: &#x57FA;&#x4E8E;&#x6807;&#x8BB0;&#x7684;XML&#x89E3;&#x7801;</h2>
<p>&#x7B2C;4.5&#x7AE0;&#x8282;&#x5C55;&#x793A;&#x4E86;&#x5982;&#x4F55;&#x4F7F;&#x7528;encoding/json&#x5305;&#x4E2D;&#x7684;Marshal&#x548C;Unmarshal&#x51FD;&#x6570;&#x6765;&#x5C06;JSON&#x6587;&#x6863;&#x8F6C;&#x6362;&#x6210;Go&#x8BED;&#x8A00;&#x7684;&#x6570;&#x636E;&#x7ED3;&#x6784;&#x3002;encoding/xml&#x5305;&#x63D0;&#x4F9B;&#x4E86;&#x4E00;&#x4E2A;&#x76F8;&#x4F3C;&#x7684;API&#x3002;&#x5F53;&#x6211;&#x4EEC;&#x60F3;&#x6784;&#x9020;&#x4E00;&#x4E2A;&#x6587;&#x6863;&#x6811;&#x7684;&#x8868;&#x793A;&#x65F6;&#x4F7F;&#x7528;encoding/xml&#x5305;&#x4F1A;&#x5F88;&#x65B9;&#x4FBF;&#xFF0C;&#x4F46;&#x662F;&#x5BF9;&#x4E8E;&#x5F88;&#x591A;&#x7A0B;&#x5E8F;&#x5E76;&#x4E0D;&#x662F;&#x5FC5;&#x987B;&#x7684;&#x3002;encoding/xml&#x5305;&#x4E5F;&#x63D0;&#x4F9B;&#x4E86;&#x4E00;&#x4E2A;&#x66F4;&#x4F4E;&#x5C42;&#x7684;&#x57FA;&#x4E8E;&#x6807;&#x8BB0;&#x7684;API&#x7528;&#x4E8E;XML&#x89E3;&#x7801;&#x3002;&#x5728;&#x57FA;&#x4E8E;&#x6807;&#x8BB0;&#x7684;&#x6837;&#x5F0F;&#x4E2D;&#xFF0C;&#x89E3;&#x6790;&#x5668;&#x6D88;&#x8D39;&#x8F93;&#x5165;&#x5E76;&#x4EA7;&#x751F;&#x4E00;&#x4E2A;&#x6807;&#x8BB0;&#x6D41;&#xFF1B;&#x56DB;&#x4E2A;&#x4E3B;&#x8981;&#x7684;&#x6807;&#x8BB0;&#x7C7B;&#x578B;&#xFF0D;StartElement&#xFF0C;EndElement&#xFF0C;CharData&#xFF0C;&#x548C;Comment&#xFF0D;&#x6BCF;&#x4E00;&#x4E2A;&#x90FD;&#x662F;encoding/xml&#x5305;&#x4E2D;&#x7684;&#x5177;&#x4F53;&#x7C7B;&#x578B;&#x3002;&#x6BCF;&#x4E00;&#x4E2A;&#x5BF9;(*xml.Decoder).Token&#x7684;&#x8C03;&#x7528;&#x90FD;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x6807;&#x8BB0;&#x3002;</p>
<p>&#x8FD9;&#x91CC;&#x663E;&#x793A;&#x7684;&#x662F;&#x548C;&#x8FD9;&#x4E2A;API&#x76F8;&#x5173;&#x7684;&#x90E8;&#x5206;&#xFF1A;</p>
<p><u><i>encoding/xml</i></u></p>
<pre><code class="lang-go"><span class="hljs-keyword">package</span> xml

<span class="hljs-keyword">type</span> Name <span class="hljs-keyword">struct</span> {
    Local <span class="hljs-keyword">string</span> <span class="hljs-comment">// e.g., &quot;Title&quot; or &quot;id&quot;</span>
}

<span class="hljs-keyword">type</span> Attr <span class="hljs-keyword">struct</span> { <span class="hljs-comment">// e.g., name=&quot;value&quot;</span>
    Name  Name
    Value <span class="hljs-keyword">string</span>
}

<span class="hljs-comment">// A Token includes StartElement, EndElement, CharData,</span>
<span class="hljs-comment">// and Comment, plus a few esoteric types (not shown).</span>
<span class="hljs-keyword">type</span> Token <span class="hljs-keyword">interface</span>{}
<span class="hljs-keyword">type</span> StartElement <span class="hljs-keyword">struct</span> { <span class="hljs-comment">// e.g., &lt;name&gt;</span>
    Name Name
    Attr []Attr
}
<span class="hljs-keyword">type</span> EndElement <span class="hljs-keyword">struct</span> { Name Name } <span class="hljs-comment">// e.g., &lt;/name&gt;</span>
<span class="hljs-keyword">type</span> CharData []<span class="hljs-keyword">byte</span>                 <span class="hljs-comment">// e.g., &lt;p&gt;CharData&lt;/p&gt;</span>
<span class="hljs-keyword">type</span> Comment []<span class="hljs-keyword">byte</span>                  <span class="hljs-comment">// e.g., &lt;!-- Comment --&gt;</span>

<span class="hljs-keyword">type</span> Decoder <span class="hljs-keyword">struct</span>{ <span class="hljs-comment">/* ... */</span> }
<span class="hljs-keyword">func</span> NewDecoder(io.Reader) *Decoder
<span class="hljs-keyword">func</span> (*Decoder) Token() (Token, error) <span class="hljs-comment">// returns next Token in sequence</span>
</code></pre>
<p>&#x8FD9;&#x4E2A;&#x6CA1;&#x6709;&#x65B9;&#x6CD5;&#x7684;Token&#x63A5;&#x53E3;&#x4E5F;&#x662F;&#x4E00;&#x4E2A;&#x53EF;&#x8BC6;&#x522B;&#x8054;&#x5408;&#x7684;&#x4F8B;&#x5B50;&#x3002;&#x4F20;&#x7EDF;&#x7684;&#x63A5;&#x53E3;&#x5982;io.Reader&#x7684;&#x76EE;&#x7684;&#x662F;&#x9690;&#x85CF;&#x6EE1;&#x8DB3;&#x5B83;&#x7684;&#x5177;&#x4F53;&#x7C7B;&#x578B;&#x7684;&#x7EC6;&#x8282;&#xFF0C;&#x8FD9;&#x6837;&#x5C31;&#x53EF;&#x4EE5;&#x521B;&#x9020;&#x51FA;&#x65B0;&#x7684;&#x5B9E;&#x73B0;&#xFF1A;&#x5728;&#x8FD9;&#x4E2A;&#x5B9E;&#x73B0;&#x4E2D;&#x6BCF;&#x4E2A;&#x5177;&#x4F53;&#x7C7B;&#x578B;&#x90FD;&#x88AB;&#x7EDF;&#x4E00;&#x5730;&#x5BF9;&#x5F85;&#x3002;&#x76F8;&#x53CD;&#xFF0C;&#x6EE1;&#x8DB3;&#x53EF;&#x8BC6;&#x522B;&#x8054;&#x5408;&#x7684;&#x5177;&#x4F53;&#x7C7B;&#x578B;&#x7684;&#x96C6;&#x5408;&#x88AB;&#x8BBE;&#x8BA1;&#x4E3A;&#x786E;&#x5B9A;&#x548C;&#x66B4;&#x9732;&#xFF0C;&#x800C;&#x4E0D;&#x662F;&#x9690;&#x85CF;&#x3002;&#x53EF;&#x8BC6;&#x522B;&#x8054;&#x5408;&#x7684;&#x7C7B;&#x578B;&#x51E0;&#x4E4E;&#x6CA1;&#x6709;&#x65B9;&#x6CD5;&#xFF0C;&#x64CD;&#x4F5C;&#x5B83;&#x4EEC;&#x7684;&#x51FD;&#x6570;&#x4F7F;&#x7528;&#x4E00;&#x4E2A;&#x7C7B;&#x578B;&#x5206;&#x652F;&#x7684;case&#x96C6;&#x5408;&#x6765;&#x8FDB;&#x884C;&#x8868;&#x8FF0;&#xFF0C;&#x8FD9;&#x4E2A;case&#x96C6;&#x5408;&#x4E2D;&#x6BCF;&#x4E00;&#x4E2A;case&#x90FD;&#x6709;&#x4E0D;&#x540C;&#x7684;&#x903B;&#x8F91;&#x3002;</p>
<p>&#x4E0B;&#x9762;&#x7684;xmlselect&#x7A0B;&#x5E8F;&#x83B7;&#x53D6;&#x548C;&#x6253;&#x5370;&#x5728;&#x4E00;&#x4E2A;XML&#x6587;&#x6863;&#x6811;&#x4E2D;&#x786E;&#x5B9A;&#x7684;&#x5143;&#x7D20;&#x4E0B;&#x627E;&#x5230;&#x7684;&#x6587;&#x672C;&#x3002;&#x4F7F;&#x7528;&#x4E0A;&#x9762;&#x7684;API&#xFF0C;&#x5B83;&#x53EF;&#x4EE5;&#x5728;&#x8F93;&#x5165;&#x4E0A;&#x4E00;&#x6B21;&#x5B8C;&#x6210;&#x5B83;&#x7684;&#x5DE5;&#x4F5C;&#x800C;&#x4ECE;&#x6765;&#x4E0D;&#x8981;&#x5B9E;&#x4F8B;&#x5316;&#x8FD9;&#x4E2A;&#x6587;&#x6863;&#x6811;&#x3002;</p>
<p><u><i>gopl.io/ch7/xmlselect</i></u></p>
<pre><code class="lang-go"><span class="hljs-comment">// Xmlselect prints the text of selected elements of an XML document.</span>
<span class="hljs-keyword">package</span> main

<span class="hljs-keyword">import</span> (
    <span class="hljs-string">&quot;encoding/xml&quot;</span>
    <span class="hljs-string">&quot;fmt&quot;</span>
    <span class="hljs-string">&quot;io&quot;</span>
    <span class="hljs-string">&quot;os&quot;</span>
    <span class="hljs-string">&quot;strings&quot;</span>
)

<span class="hljs-keyword">func</span> main() {
    dec := xml.NewDecoder(os.Stdin)
    <span class="hljs-keyword">var</span> stack []<span class="hljs-keyword">string</span> <span class="hljs-comment">// stack of element names</span>
    <span class="hljs-keyword">for</span> {
        tok, err := dec.Token()
        <span class="hljs-keyword">if</span> err == io.EOF {
            <span class="hljs-keyword">break</span>
        } <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> err != <span class="hljs-literal">nil</span> {
            fmt.Fprintf(os.Stderr, <span class="hljs-string">&quot;xmlselect: %v\n&quot;</span>, err)
            os.Exit(<span class="hljs-number">1</span>)
        }
        <span class="hljs-keyword">switch</span> tok := tok.(<span class="hljs-keyword">type</span>) {
        <span class="hljs-keyword">case</span> xml.StartElement:
            stack = <span class="hljs-built_in">append</span>(stack, tok.Name.Local) <span class="hljs-comment">// push</span>
        <span class="hljs-keyword">case</span> xml.EndElement:
            stack = stack[:<span class="hljs-built_in">len</span>(stack)<span class="hljs-number">-1</span>] <span class="hljs-comment">// pop</span>
        <span class="hljs-keyword">case</span> xml.CharData:
            <span class="hljs-keyword">if</span> containsAll(stack, os.Args[<span class="hljs-number">1</span>:]) {
                fmt.Printf(<span class="hljs-string">&quot;%s: %s\n&quot;</span>, strings.Join(stack, <span class="hljs-string">&quot; &quot;</span>), tok)
            }
        }
    }
}

<span class="hljs-comment">// containsAll reports whether x contains the elements of y, in order.</span>
<span class="hljs-keyword">func</span> containsAll(x, y []<span class="hljs-keyword">string</span>) <span class="hljs-keyword">bool</span> {
    <span class="hljs-keyword">for</span> <span class="hljs-built_in">len</span>(y) &lt;= <span class="hljs-built_in">len</span>(x) {
        <span class="hljs-keyword">if</span> <span class="hljs-built_in">len</span>(y) == <span class="hljs-number">0</span> {
            <span class="hljs-keyword">return</span> <span class="hljs-literal">true</span>
        }
        <span class="hljs-keyword">if</span> x[<span class="hljs-number">0</span>] == y[<span class="hljs-number">0</span>] {
            y = y[<span class="hljs-number">1</span>:]
        }
        x = x[<span class="hljs-number">1</span>:]
    }
    <span class="hljs-keyword">return</span> <span class="hljs-literal">false</span>
}
</code></pre>
<p>main&#x51FD;&#x6570;&#x4E2D;&#x7684;&#x5FAA;&#x73AF;&#x6BCF;&#x9047;&#x5230;&#x4E00;&#x4E2A;StartElement&#x65F6;&#xFF0C;&#x5B83;&#x628A;&#x8FD9;&#x4E2A;&#x5143;&#x7D20;&#x7684;&#x540D;&#x79F0;&#x538B;&#x5230;&#x4E00;&#x4E2A;&#x6808;&#x91CC;&#xFF0C;&#x5E76;&#x4E14;&#x6BCF;&#x6B21;&#x9047;&#x5230;EndElement&#x65F6;&#xFF0C;&#x5B83;&#x5C06;&#x540D;&#x79F0;&#x4ECE;&#x8FD9;&#x4E2A;&#x6808;&#x4E2D;&#x63A8;&#x51FA;&#x3002;&#x8FD9;&#x4E2A;API&#x4FDD;&#x8BC1;&#x4E86;StartElement&#x548C;EndElement&#x7684;&#x5E8F;&#x5217;&#x53EF;&#x4EE5;&#x88AB;&#x5B8C;&#x5168;&#x7684;&#x5339;&#x914D;&#xFF0C;&#x751A;&#x81F3;&#x5728;&#x4E00;&#x4E2A;&#x7CDF;&#x7CD5;&#x7684;&#x6587;&#x6863;&#x683C;&#x5F0F;&#x4E2D;&#x3002;&#x6CE8;&#x91CA;&#x4F1A;&#x88AB;&#x5FFD;&#x7565;&#x3002;&#x5F53;xmlselect&#x9047;&#x5230;&#x4E00;&#x4E2A;CharData&#x65F6;&#xFF0C;&#x53EA;&#x6709;&#x5F53;&#x6808;&#x4E2D;&#x6709;&#x5E8F;&#x5730;&#x5305;&#x542B;&#x6240;&#x6709;&#x901A;&#x8FC7;&#x547D;&#x4EE4;&#x884C;&#x53C2;&#x6570;&#x4F20;&#x5165;&#x7684;&#x5143;&#x7D20;&#x540D;&#x79F0;&#x65F6;&#xFF0C;&#x5B83;&#x624D;&#x4F1A;&#x8F93;&#x51FA;&#x76F8;&#x5E94;&#x7684;&#x6587;&#x672C;&#x3002;</p>
<p>&#x4E0B;&#x9762;&#x7684;&#x547D;&#x4EE4;&#x6253;&#x5370;&#x51FA;&#x4EFB;&#x610F;&#x51FA;&#x73B0;&#x5728;&#x4E24;&#x5C42;div&#x5143;&#x7D20;&#x4E0B;&#x7684;h2&#x5143;&#x7D20;&#x7684;&#x6587;&#x672C;&#x3002;&#x5B83;&#x7684;&#x8F93;&#x5165;&#x662F;XML&#x7684;&#x8BF4;&#x660E;&#x6587;&#x6863;&#xFF0C;&#x5E76;&#x4E14;&#x5B83;&#x81EA;&#x5DF1;&#x5C31;&#x662F;XML&#x6587;&#x6863;&#x683C;&#x5F0F;&#x7684;&#x3002;</p>
<pre><code>$ go build gopl.io/ch1/fetch
$ ./fetch http://www.w3.org/TR/2006/REC-xml11-20060816 |
    ./xmlselect div div h2
html body div div h2: 1 Introduction
html body div div h2: 2 Documents
html body div div h2: 3 Logical Structures
html body div div h2: 4 Physical Structures
html body div div h2: 5 Conformance
html body div div h2: 6 Notation
html body div div h2: A References
html body div div h2: B Definitions for Character Normalization
...
</code></pre><p><strong>&#x7EC3;&#x4E60; 7.17&#xFF1A;</strong> &#x6269;&#x5C55;xmlselect&#x7A0B;&#x5E8F;&#x4EE5;&#x4FBF;&#x8BA9;&#x5143;&#x7D20;&#x4E0D;&#x4EC5;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x540D;&#x79F0;&#x9009;&#x62E9;&#xFF0C;&#x4E5F;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x5B83;&#x4EEC;CSS&#x98CE;&#x683C;&#x7684;&#x5C5E;&#x6027;&#x8FDB;&#x884C;&#x9009;&#x62E9;&#x3002;&#x4F8B;&#x5982;&#x4E00;&#x4E2A;&#x50CF;&#x8FD9;&#x6837;</p>
<pre><code class="lang-html"><span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">id</span>=<span class="hljs-string">&quot;page&quot;</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;wide&quot;</span>&gt;</span>
</code></pre>
<p>&#x7684;&#x5143;&#x7D20;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x5339;&#x914D;id&#x6216;&#x8005;class&#xFF0C;&#x540C;&#x65F6;&#x8FD8;&#x6709;&#x5B83;&#x7684;&#x540D;&#x79F0;&#x6765;&#x8FDB;&#x884C;&#x9009;&#x62E9;&#x3002;</p>
<p><strong>&#x7EC3;&#x4E60; 7.18&#xFF1A;</strong> &#x4F7F;&#x7528;&#x57FA;&#x4E8E;&#x6807;&#x8BB0;&#x7684;&#x89E3;&#x7801;API&#xFF0C;&#x7F16;&#x5199;&#x4E00;&#x4E2A;&#x53EF;&#x4EE5;&#x8BFB;&#x53D6;&#x4EFB;&#x610F;XML&#x6587;&#x6863;&#x5E76;&#x6784;&#x9020;&#x8FD9;&#x4E2A;&#x6587;&#x6863;&#x6240;&#x4EE3;&#x8868;&#x7684;&#x901A;&#x7528;&#x8282;&#x70B9;&#x6811;&#x7684;&#x7A0B;&#x5E8F;&#x3002;&#x8282;&#x70B9;&#x6709;&#x4E24;&#x79CD;&#x7C7B;&#x578B;&#xFF1A;CharData&#x8282;&#x70B9;&#x8868;&#x793A;&#x6587;&#x672C;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x548C; Element&#x8282;&#x70B9;&#x8868;&#x793A;&#x88AB;&#x547D;&#x540D;&#x7684;&#x5143;&#x7D20;&#x548C;&#x5B83;&#x4EEC;&#x7684;&#x5C5E;&#x6027;&#x3002;&#x6BCF;&#x4E00;&#x4E2A;&#x5143;&#x7D20;&#x8282;&#x70B9;&#x6709;&#x4E00;&#x4E2A;&#x5B50;&#x8282;&#x70B9;&#x7684;&#x5207;&#x7247;&#x3002;</p>
<p>&#x4F60;&#x53EF;&#x80FD;&#x53D1;&#x73B0;&#x4E0B;&#x9762;&#x7684;&#x5B9A;&#x4E49;&#x4F1A;&#x5BF9;&#x4F60;&#x6709;&#x5E2E;&#x52A9;&#x3002;</p>
<pre><code class="lang-go"><span class="hljs-keyword">import</span> <span class="hljs-string">&quot;encoding/xml&quot;</span>

<span class="hljs-keyword">type</span> Node <span class="hljs-keyword">interface</span>{} <span class="hljs-comment">// CharData or *Element</span>

<span class="hljs-keyword">type</span> CharData <span class="hljs-keyword">string</span>

<span class="hljs-keyword">type</span> Element <span class="hljs-keyword">struct</span> {
    Type     xml.Name
    Attr     []xml.Attr
    Children []Node
}
</code></pre>

                                
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